1.Which of the following is/are required for constructing a confidence interval?

a. Mean

b.Level of confidence

c.Standard Error

d.All of the above

2.Explain the utility of a "control" variable.

3.What does a significant Beta bin regression analysis mean?

4.A regression line minimizes the distance between the actual and predicted data in a scatterplot. This is called a:

5.What two characteristics of the relationship are expressed when the correlation coefficient is -.2?

6.The alpha level is also called the:

a.Degrees of freedom

b.Levels of significance

c.Stand error

d.Level of confidence

7.Describe the null hypothesis in a Chi-Square Test.

8.Describe the null hypothesis in a test of difference between means.

9."N" is the most important and influential aspect of data

10. Why is standard error important in statistical analysis?

11. The alpha level determines the allowable risk of this type of error:

a.Standard

b.Sampling Error

c.Type II

d.Type I

12. When there is a negative correlation what happens to the dependent variable as the independent variable decreases?

a.Decrease

b.Not enough information given

c.No effect

d.Increases

13. This curve is symmetrical, unimodal, and changes shape as a function of sample size.

a.X squared

b.Z

c.T

d.F

14. When you increase the level of confidence, i.e. go from 95% to 99% what happens to the range of your confidence interval?

a.Depends on the sample size

b.Decreases

c.Increases

d.Remains the same

15. What does r² tell us?